Apollo 11 and its astronauts, Neil Armstrong, Edwin "Buzz" Aldrin and Michael Collins, went into orbit around the moon in 1969.

King's special, "Unthinkable: The Alzheimer's Epidemic," airs Sunday at 8 p.m. EDT/PDT on CNN.

Pakistan became an Islamic republic in 1956.

West Virginia became the 35th state in 1863.